Re: [PATCH v1] UefiCpuPkg/PiSmmCpuDxeSmm: Fix S3 failure in SmmRestoreCpu

["Zeng, Star" <star.zeng@intel.com>]

Reviewed-by: Star Zeng <star.zeng@intel.com>

-----Original Message-----
From: Wu, Jiaxin <jiaxin.wu@intel.com> 
Sent: Monday, March 13, 2023 3:04 PM
To: devel@edk2.groups.io
Cc: Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; Zeng, Star <star.zeng@intel.com>; Laszlo Ersek <lersek@redhat.com>; Gerd Hoffmann <kraxel@redhat.com>
Subject: [PATCH v1] UefiCpuPkg/PiSmmCpuDxeSmm: Fix S3 failure in SmmRestoreCpu

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4368

This issue is caused by the commit:
ec07fd0e35d90dbcc36be300a9ceeac29c5de2ad

GetFirstGuidHob() should not be used after exit boot service.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Zeng Star <star.zeng@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
---
 UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c b/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
index d408b3f9f7..240eee6a7d 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c
@@ -821,23 +821,11 @@ SmmRestoreCpu (
     // First time microcode load and restore MTRRs
     //
     InitializeCpuBeforeRebase ();
   }
 
-  //
-  // Make sure the gSmmBaseHobGuid existence status is the same between normal and S3 boot.
-  //
-  ASSERT (mSmmRelocated == (BOOLEAN)(GetFirstGuidHob (&gSmmBaseHobGuid) != NULL));
-  if (mSmmRelocated != (BOOLEAN)(GetFirstGuidHob (&gSmmBaseHobGuid) != NULL)) {
-    DEBUG ((
-      DEBUG_ERROR,
-      "gSmmBaseHobGuid %a produced in normal boot but %a in S3 boot!",
-      mSmmRelocated ? "is" : "is not",
-      mSmmRelocated ? "is not" : "is"
-      ));
-    CpuDeadLoop ();
-  }
+  DEBUG ((DEBUG_INFO, "SmmRestoreCpu: mSmmRelocated is %d\n", mSmmRelocated));
 
   //
   // Check whether Smm Relocation is done or not.
   // If not, will do the SmmBases Relocation here!!!
   //
-- 
2.16.2.windows.1